nsssc 2014 harding university
DESCRIPTION
NSSSC 2014 Harding University. Anna Shafer Edmond Wilson, Ph.D. National Student Solar spectrograph competition. Design & Build Analyze Outreach Compete. NSSSC 2014 Team. SpectroMeter design. Spectrometer control. Wavelength selection. Grating position Turntable mount Precision. - PowerPoint PPT PresentationTRANSCRIPT
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Anna Shafer
Edmond Wilson, Ph.D.
NSSSC 2014 HARDING UNIVERSITY
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NATIONAL STUDENT SOLAR SPECTROGRAPH COMPETITION
• Design & Build
• Analyze
• Outreach
• Compete
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NSSSC 2014 TEAM
Tamara Reed
Brennan Thomason
Anna Shafer
Stephanie Inabnet
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SPECTROMETER DESIGN
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SPECTROMETER CONTROL
Wavelength Selection
Focus on Wavelength
Capture and Process
Write Spectra to
SD Card
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WAVELENGTH SELECTION• Grating position
• Turntable mount
• Precision
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STEPPER MOTOR• Controls grating position
• Precision to 1.8°o Direction selectiono Pulse input
STP-DRV-4035
STP-MTR-17040
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PROCESSINGCommunicat
e• Processor and detector
Capture • Read spectral output
Filter • Average to remove noise
Store • SD card via shield
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COMMUNICATION• Timing signals
o Synchronization: ROGo Data Clock: CLK
• 2087 bytes per spectra
Arduino UNO
SONY ILX511
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COMMUNICATION TIMING• Chart for the timing
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COMMUNICATION TIMING
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SPECTRA CAPTURES
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ANALOG CAPTURE• Sampling Accuracy
o Speed: 20 µseco Reference voltage 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
020406080
100120140
Default Reference
Time (sec)
Volta
ge (m
V)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10
20406080
100120140
Internal Analog Reference
Time (sec)
Volta
ge (m
V)
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FILTER AND STORE• Noise removal
oMultiple readings – 3 to 5o Average data points
• SD cardo 9600 baud serialo .csv format
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QUESTIONS?